Dental plate



N0. 6l5,404. Patented Dec. 6, I898.

J. S. NAULDEB.

DENTAL PLATE.

(Application filed-Nov. 6, 1894.)

.(No Model.)

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UNITED STATES 7 PATENT OFFICE.

JOHN S. -NAULDER, OF MCKEESPORT, PENNSYLVANIA.

DENTAL PLATE.

SPECIFICATION forming part of Letters Patent No. 615,404, dated December6, 1898.

Application filed November 6, 1894. Serial No. 528,111 (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN S. NAULDER, a citizen of the United States,residing at McKeesport, in the county of Allegheny and State ofPennsylvania, have invented or discovered new and useful Improvements inthe Mannfacture of Dental Plates, of which the following is aspecification.

In the accompanying drawings, which make part of this specification,Figure 1 is an enlargedsection on line 1 1 of Fig. 3. Fig. 2 is aperspective of the plate, showing several ears not yet bent around thefacial band 4. Fig. 3 is a plan of the sheet of metal employed. Fig. 4is an enlarged section on line 4 4 of Fig. 2. Fig. 5 is a plan brokenaway to show a plate with a plain palatal surface. Fig. 6 is aperspective of the plate with the lead sheet turned up. Fig. 7 is anenlarged section on line 7 7 of Fig. 8. Fig. 8 is a broken perspectiveof a plate partly completed.

The purposes of my invention, generally stated, are an improved dentalplate of perfoindentated metal, whether the plate be single, double, orplain on the palatal surface and perfoindentated on the lingual surface.This plate is made from a novel sheet or blank. I have also providedspecial reinforcements for the plate in the use of woven or plaitedfacial and lingual bands.

The condition of the patients mouth determines whether I should swage adouble or a single metal plate. In a normal and healthy mouth I usetwenty-eight (28) or thirty (30) standard-gage metal,preferably ofaluminum. This sheet 2 is provided with conical perfoindentationspunched alternately from either side. These are seen at c c in Figs. 1and 3. I cut the metal as near the desired size as possible, anneal, ifnecessary, to make it more pliable, place it on the die, and force itdown on the die as muchas possible by using a rubber mallet, so as topreserve the perfoindentations of the metal. I trim the metal somewhatnear the shape of the die. I make a number of incisions from themarginal edge of the plate, cutting them so that they can be turned up011 the inside of the alveolar ridge as ears h h, the incisions beingfrom onefourth to three-eighths of an inch in width. The remaining partof the marginal edge of the plate is then turned down over the die, thesmall incisions still turned backward to- Ward the inside of the metalplate. I then take twenty-five-gage aluminum wire or the wire of anyother suitable material, taking from six to nine wires, owing to thestrength needed. I divide these wires into three equal partstwo wires ineach strand if six are used and three in each if nine wires are used. Ithen plait them in an ordinary strand plaitin g. I bend the now plaitedwires to the shape of the plate. I put the band of the plaited wires inposition and force the incisions down over the band with my fingers. Icall this the lingual band 3. After placing the lingual band in positionI proceed to swage the plate. I now plaitmy facial band 4 in the samemanneras the lingual band. I bend this facial band around the facial andbuccal portions of the plate, turning the metal of the plate over on theband to hold the band in position. The plate is now swaged for the finaltime. The plate when nowtaken from the flask will fit the first ororiginal model taken from the impression of the patients mouth. Theplate is now ready for grinding and placing the teeth upon it. 7

The process described for the single metal plate is all that isnecessary in making any of the double metal plates. The doubleperfoindentated plate may be swaged either singly or together, because Iuse a much lighter metale. g., thirty-eight or forty-the lighter gagefor the palatal part of the plate and the heavier gage for the lingualpart of the plate. In a double metal plate I make my incisions on thelingual plate for the lingual band. The lingual part of the plate istrimmed around its marginal edge, so that it fits neatly down to wherethe metal of the palatal part of the plate flares out. The metal whichflares out from the palatal part of the plate I use to turn up upon andhold the facial band and lingual part of the plate together, as if thedouble plate were but a single metal.

In Fig. 5 is shown a third style of plate. This style of plate is madewith a plain palatal surface 5 and a perfoindentated lingual surface 6.The other details of the plate are not shown. The process of making thisplate is the same as that described for making plate No. 2, except thatin making No. 3 it is sometimes necessary to turn up the palatal part ofthe plate over the lingual part of the plate at the rear of the plate orits posterior portion. This plate is made of double sheets, one plainand one perfoindentated.

The different features and the different pathological conditions ofvarious mouths make it necessary to make the different styles of plates.For a healthy mouth of normal features I usually make the single metalplate, because it can be made at less cost and time; but when there isin my opinion the slightest predisposition to tenderness or irritationof the mouth, which might be caused by the coloring-matter in therubber, I make the double perfoindentated plate No. 2. This acts as apreventive to rubber-poisoning, because every second indentation of theplate is thrown bare by the thinness of the metal to the palatal portionof the mouth. For mouths already in that condition or rubberpoisonedfrom wearing a rubber plate I make the palatal part of the plate plainand the lingual part I make with the perfoindentated metal. This isdescribed as Plate 3. If gold should be preferred by the patient, I usegold instead of aluminium for the palatal part of the plate.

My method makes an entire metal palatal surface to the plate and makes amuch better fitting plate than can be made by the old method, since inthe old method a heavy single metal plate usually swaged by the oldmethod with zinc dies and lead counter-dies was used. After the swaging,850., of my plate, either single or double, is completed the plate isput on the articulated model. The plate is then covered on its lingualside by a thin sheet of lead such as is used by florists.

This sheet-lead keeps the plate clear of wax,

dirt, &c., and also regulates the thickness of the rubber on the plate,making almost a finished plate, except the polishing. The teeth are nowset on the model with sufficient wax to hold the teeth in position. Thisbeing finished the teeth and plate are flasked in the usual way. Whenready, the flask is opened and the wax, &c., is scalded out. The metalplate is left on the model side of the flask and the teeth in the toothside. The rubber is packed on the lingual side only, which is thereverse of the old way. The rubber will percolate through theperforations of the plate to the palatal side in plates 1 and 2.

The

flask is then closed and vulcanized in the usual manner.

The facial and lingual bands as used in these plates possess theseadvantages:

First. They are adaptable to the facial and lingual portions of theplate, possessing, as they do, two fiatsidesz'. e. the bands-which takeup but little space, the lingual being easily bent on its edge and thefacial on its side.

Second. Since theyare intact and not weakened,as is the plate,byindentations, they thus give strength to the facial and lingual portionsof the plate where strength is most required, and yet the plaited Wirebands permit the filtration or percolation of the rubber as readily asthe perfoindentated portions of the plate. Thus I am enabled to make myplates, if aluminium, as thin as a gold plate and much lighter in weightthan a gold plate. In partial upper plates I omit the facial band andincrease the strength of the lingual band. In partial lower plates I usethe lingual band and sufficient rubber to weld it together. Such apartial plate might be called a wire plate.

Having described my invention, I claim- 1. A dental plate ofperfoindentated metal provided with a strengthening wire band around thealveolar ridge and secured to said plate.

2. A dental plate of perfoindentated metal provided with independentfacial and lingual bands of wire, secured to the plate by makingincisions in the margin of the plate and turning the ears thus formedaround the facial and lingual band.

3. A dental plate made of double sheets 0 metal provided with facial andlingual bands of wire, said bands being secured to the plate by makingincisions in the margin of the plate and turning the ears thus formedaround the facial and lingual band.

4. A dental plate formed of a smooth sheet of metal for the palatal sideand a sheet of perfoindentated metal for the lingual side, with astrengthening-band ofwire around the alveolar ridge and secured to saidplate.

In testimony whereof I have hereunto set my hand this 27th day ofOctober, A. D, 1894.

JOHN S. NAULDER.

lVitn esses WM. L. PIERCE, WILLIAM BEAL.

